Objective: to build a modular system (also called a super stove) that makes efficient use of input raw materials (twigs, leaves, paper, and similar scraps) to make fire. This system will ensure that you can light the fire easily, control it easily, modulate it (increase/decrease intensity) easily, put it out easily, and carry it with you easily.

Concepts used: Fluid mechanics – to ensure effective movement of air enabling enhanced fire burning, thermodynamics – to ensure effective trapping of heat and minimal loss, and heat transfer – architecture enables efficient modulation of heat transfer across components.

Materials needed: 3 metal cans (55, 28, and 15.5 ounces). They don’t need to be exactly these sizes, but the largest two should be fairly close in size, and the smallest one should be substantially smaller. Also need a flat-bottom nail (quarter inch preferred), a hammer, a black marker and a snipper (also often called tin snips or metal shears and is like a pair of heavy-duty scissors designed for cutting metal instead of paper).

Methodology: The explanation through the video should be followed. Nonetheless, here is an outline of the steps:

SAFETY PRECAUTION: Wear gloves to prevent cuts and injuries when making the Solar Stove. Once the stove is made and in use, be careful when dealing with fire and smoke, like wearing gloves, a mask, and goggles. 

• Take off the lid of the largest can. Bottom stays as is. Take the medium can. Again, take off the lid. Bottom stays as is. Now, on to the smallest can. And for this, both the top and the bottom lids should be taken off. The lids are kind of jagged and a little sharp, so be careful. With one of the now-cut small lids of the small can, make a contour of a circle (using a black pen). This bit is better understood by looking at the video. 
• Using nail and hammer, make holes across the top circumference (just below the rim) of the largest can. You can see in the video that I am not very good with my hands, so my holes are not nice and not spread uniformly or in a perfect circumference. 
• You have to nestle the medium can within the largest can and use the small can as an inlet through the side. The Solar Stove is now made.
• You will feed the wood, leaves, twigs, etc. through the small can inlet. The top is where the fire has an outlet to send smoke through, and you can control the amount of fire and smoke by controlling the amount of area of the inlet and the outlet. Again, the video will help with understanding these steps.

Video Arabic (with English Subtitles):

approdotcc/av/superstove_en_export5_ar.mp4 at master · biomassives/approdotcc · GitHub

Reference: Hobo Rocket Stove by WayPoint Survival